Hybridization of cultivated Vitis vinifera with wild V. californica and V. girdiana in California Gerald S. Dangl1, Mary Lou Mendum2, Judy Yang1, M. Andrew Walker3 & John E. Preece4 1Foundation Plant Services, University of California Davis, One Shields Ave., Davis, California 95616 2Department of Plant Sciences, University of California Davis, One Shields Ave., Davis, California 95616 3Department of Viticulture and Enology, University of California Davis, One Shields Ave., Davis, California 95616 4National Clonal Germplasm Repository, USDA-ARS, University of California Davis, One Shields Ave, Davis, California 95616 Keywords Abstract California wild grape, domesticated plan introduction, genetic diversity, mixed-species Hybridization of introduced domesticates and closely related natives is well ancestry, natural hybrids, plant conservation documented in annual crops. The widespread introduction of the domesticated genetics. grapevine, Vitis vinifera, into California where it overlaps with two native con- generics, with which it is interfertile, provides opportunity to investigate Correspondence hybridization between woody perennials. Although geographically widespread, Gerald S. Dangl, Foundation Plant Services, the introduction over the past two centuries has been limited to a few elite clo- University of California Davis, One Shields nal cultivars, providing a unique opportunity to study the effects of hybridiza- Ave., Davis, CA 95616. Tel: (530) 752-7540; tion on the native species. The amount of hybridization with V. vinifera and Fax: (530) 752-2132; the genetic diversity of wild-growing Vitis californica and Vitis girdiana were E-mail:
[email protected] examined using nineteen microsatellite markers. STRUCTURE analysis was used to define hybrid and introgressed individuals and to analyze genetic struc- Funding Information ture of the native species.